JP2623050B2 - Mounting structure for battery case for electric bicycle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric bicycle battery case mounting structure for detachably mounting a battery case on an electric bicycle body.

[0002]

2. Description of the Related Art Conventionally, in some electric bicycles using a motor as auxiliary power, a battery is removed from a vehicle body together with a battery case when the battery is charged. In order to perform charging by removing the battery case with this type of electric bicycle, first, the lock and fixing device of the battery case is removed, and the connector of the discharge circuit that electrically connects the battery and the motor side is gripped. Separate this
You. Then, the battery case was removed from the vehicle body, carried to a place where a charger was provided, and charged.

After charging, the battery case is mounted on the vehicle body as before, and the battery is connected to the motor by holding the connector of the discharge circuit.

That is, when the battery case is attached to and detached from the vehicle body, it is necessary to separately attach and detach the connector of the discharge circuit.

[0005]

However, if the connector of the discharge circuit is separately attached and detached each time the battery is charged as described above, it takes time and effort and the charging operation becomes complicated.

In a conventional electric bicycle, a battery
The location where the terry case was mounted on the body was also a problem. You
That is, for example, it is disclosed in JP-A-57-74285.
Like an electric bicycle, a loading platform is provided above the rear wheels.
When mounting the battery case on a
When charging the terry, place the battery case
When removing the battery case from the
The battery is heavy when unloading from
Lee case must be raised above the rear wheels
Absent. The mounting position of the battery case is
I have to position it so that it does not get in the way when getting down
There is also a restriction that it must be done.

The present invention has been made to solve such a problem.
Between the battery case and the vehicle body.
Existing connectors can be easily attached and detached.
The battery case when attaching / detaching the battery case to / from the vehicle body.
The aim is to have as little power as possible.

[0006]

The structure for mounting the battery case for an electric bicycle according to the first invention is a vehicle for an electric bicycle.
Extend the body frame downward from the head pipe
Secure the seat tube extending upward to the rear of the tube
Then, a foot space opened upward in a substantially V-shape when viewed from the side
And a bar above the down tube.
Battery case with battery and long shape
The longitudinal direction along the down tube in the on-board condition
The battery case is detachable and discharges at the bottom of this battery case.
And the lower part of the foot space
Then, on the body frame side,
Motor side contact which comes into contact with / separates from the discharge contact terminal with the operation
The contact terminals are fixed .

The structure for mounting the battery case for an electric bicycle according to the second invention is the same as that of the battery case for the electric bicycle according to the first invention.
In the mounting structure of the battery case,
Connect the battery case to the motor-side contact terminal
This is the same as the escape direction .

[0009] mounting structure of the third electric bicycle battery case according to the invention, the bar electric bicycle according to the first invention
In the mounting structure of the battery case,
When the connection direction with the motor side contact terminal is
The direction is substantially parallel to the axis of the tube.

[0010]

According to the first aspect, the battery case is mounted on the vehicle body.
When attaching to or removing from the vehicle body,
The lifting height is almost the same as the down tube
In addition, the foot space opened upward is called the work space.
And can be used widely.
Any obstacles when mounting on the tube
There is no. Also, the battery case comes from the down tube
Does not protrude significantly upward. Furthermore, the motor side contact terminal
Located at the bottom of the upwardly open foot space
The discharge contact terminal on the battery case side.
When connecting, you can easily check the connection destination.

Further, the battery case is attached to the vehicle body.
By attaching / detaching, the discharge contact terminal is connected to the motor side.
It is moved toward and away from the contact terminal. According to the third invention, the battery
When the terry case is mounted on the vehicle, the battery
Depending on the weight of the case, the discharge contact terminal is the motor side contact end
It is urged to the child side.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the first invention will be described below in detail with reference to FIGS. FIG. 1 is a side view of an electric bicycle employing a battery case mounting structure according to the first invention, FIG. 2 is an enlarged sectional view showing a support portion of a battery case support box, and FIG. 3 is a motor unit in FIG. FIG. 4 is a plan view of a battery case support box, and FIG. 5 is an exploded perspective view of the battery case.

FIG. 6 is an enlarged view showing a charging port portion of the battery case. FIG. 6 (a) is a plan view, FIG. 6 (b) is a sectional view taken along the line BB in FIG. c) is (a)
It is CC sectional drawing in a figure. FIG. 7 is a vertical sectional view of the battery case support box, and FIG.
FIG. 9 is an exploded perspective view of the battery case support box.

FIG. 10 is a perspective view showing a procedure for removing the battery case from the vehicle body. FIG. 10A shows a state in which an outer cover is opened, and FIG. 10B shows a state in which the battery case is removed from the support box. The state of is shown. FIG. 3C shows a state in which the battery case is removed from the support box, and FIG. 3D shows a state in which the battery case is removed from the vehicle body.

FIG. 11 is a perspective view showing a state in which the battery case is removed from the vehicle body for charging. FIG. 12 is a perspective view showing a state in which the battery case is charged without removing the battery case from the vehicle body.

In these figures, 1 is an electric bicycle, 2
Is a frame of the electric bicycle 1. This frame 2
Is a front fork 4 on which the front wheel 3 is rotatably provided.
Pipe 2a for supporting the steering freely, and a down tube 2b extending rearward and downward from the head pipe 2a
Is connected to the rear end of the down tube 2b via the motor bracket 5, and tilts upward from the connection.
, A chain stay 2d extending rearward from the motor bracket 5, a seat stay 2e for connecting an upper portion of the seat tube 2c and a rear end of the chain stay 2d, and the like. . And this frame 2 is the down tube
2b and in front of the seat tube 2c
A substantially V-shaped footing space S with an open upper side is provided.
It is a structure that can be done.

Reference numeral 6 denotes a handle mounted on the upper end of the front fork 4, reference numeral 7 denotes a cushioned seat mounted on the upper end of the seat tube 2c, and reference numeral 8 denotes a rear wheel. The rear wheel 8 is rotatably supported by a rear wheel bracket 2f provided integrally with a rear end of the chain stay 2d and a lower end of the seat stay 2e. Are linked.

Reference numeral 10 denotes an exterior cover that covers a battery case and a motor unit described later. The outer cover 10 extends along a down tube 2b of the frame 2 and is supported and fixed to the down tube 2b. The lower cover 10a is connected to the lower cover 10a via a pivot 10b located on the motor bracket 5 side. The upper cover 10c is supported so as to be vertically swingable and closes an upper opening of the lower cover 10a.

The lower cover 10a is a down tube 2
b is covered from below and the motor bracket 5 is covered from left and right sides. Also, the upper cover 10c
Has a structure in which the whole is formed in a substantially downward U-shaped cross section and covers the upper opening of the lower cover 10a, and a locking device 11 is mounted on a portion which becomes a swing end. Reference numeral 11a denotes a key of the locking device 11.

In the exterior cover 10 configured as described above, the locking device 11 is unlocked and the front portion of the upper cover 10c is lifted to open the upper cover 10c as shown by a two-dot chain line a in FIG. become.

Reference numeral 12 denotes a motor unit serving as auxiliary power for the electric bicycle 1. The motor unit 12 includes a motor 13 supplied from a battery described later, a gear box 15 having a crankshaft 14, and a crankshaft 14.
A chain ring 16, a crank 17, a pedal 18, and the like are mounted on a shaft, and are supported and fixed to the motor bracket 5 with the motor 13 standing. In addition,
A chain ring 16 is connected to the rear wheel 8 via a chain 9. Reference numeral 19 denotes a fixing bolt for fixing the motor unit 12 to the motor bracket 5.

The motor bracket 5 supporting the motor unit 12 is constructed by welding a tubular motor cover 5b to a pipe assembly 5a having a T-shape in a side view, which is welded to the down tube 2b. The seat tube 2c is coaxially welded to the upper end of the motor cover 5b, and the motor 13 is positioned in the motor cover 5b. That is, when the motor unit 12 is mounted on the motor bracket 5, the motor unit 12 is positioned at the center in the vehicle width direction as shown in FIG.

The control unit 20 attached to the lower part of the down tube 2b is connected to the motor 13 of the motor unit 12. Control unit 20
Is configured to transmit the power from the motor 13 to the crankshaft 14 by rotating the motor 13 only when the pedaling force of the occupant is applied to the crankshaft 14 from the pedal 18. That is, when the pedal 18 is depressed, a rotational torque from the motor 13 is applied to the crankshaft 14 in addition to the depressing force. The gear box 15 has:
In order to prevent torque from being transmitted from the crankshaft 14 to the motor 13 side when rotation of the pedal 18 becomes higher than rotation of the motor 13 side and rotation resistance is increased, a one-way clutch (not shown) is provided. I have.

[0024] 21 in the battery case, the battery
-The case 21 is formed in a long shape as shown in FIG.
A battery 22 for supplying power to the motor 13 and the control unit 20 is accommodated in the inside. The battery case 21 is formed of a lower case 23, an upper case 24, and the like, and is configured to be inserted into a battery case support box 25 described later and supported by the frame 2.
Here, the structure of the battery case 21 will be described in detail with reference to FIG.

The lower case 23 and the upper case 24 are integrally formed of a synthetic resin, and are formed along the down tube 2b of the frame 2 so as to house two batteries 22 in front and rear. The two batteries 22 are connected in series, and the connection cable is connected to a discharge connector 26 as a discharge contact terminal. A charging connector 27 serving as a charging contact terminal is connected to the connection cable in parallel with the discharging connector 26.

The lower case 23 and the upper case 24 are assembled so as not to be separated from each other by an engaging portion 23a and a locking piece 24a formed integrally with each other. The engaging portion 23a provided in the opening of the lower case 23 is provided with a locking piece 24a.
It has a conventionally well-known structure that is locked by penetrating the inside.

On the upper part of the upper case 24, a protruding portion 24b which fits into a support box 25 described later is integrally formed. The discharge connector 26 is attached to the protrusion 24b. As the discharge connector 26, a female connector into which a contact of a motor-side connector to be described later is inserted is used. The discharge port 26 is screwed to the upper case 24 with its connection port positioned at the opening 24c of the protrusion 24b. Further, the connection direction of the discharge connector 26 is the same as the longitudinal direction of the battery case 21. In addition,
In FIGS. 5 and 8, reference numeral 26a denotes the discharge connector 2;
6 shows a nut plate for fixing 6 to the upper case 24;
26b indicates a mounting screw .

As shown in FIGS. 7 and 8, a locking button 28 for engaging with the support box 25 is provided on the protruding portion 24b.
Are integrally formed. The locking button 28 has a locking portion further protruding from the upper surface of the protruding portion 24b, is configured to be able to protrude and retract from the protruding portion 24b, and is a leaf spring screwed to the back surface of the discharge portion 24b. 29 is urged to the protruding side.

In this embodiment, the charging connector 27 is of a male type of a magnetic attraction type, and its contact is fixed to the upper case 24 with the contact positioned at the charging port 24d of the upper case 24. The mounting portion of the charging connector 27 is shown in FIG.

The charging connector 27 is arranged with the contact 27a facing upward (in a direction perpendicular to the upper surface of the upper case 24), and is fixed to the upper case 24 from behind by a tapping screw 27b. Further, the contact 27a is disposed in a C-shape in plan view so as not to confuse the positive electrode and the negative electrode.

6A to 6C, reference numeral 3
Reference numeral 0 denotes a connector cover for closing the charging port 24c.
The connector cover 30 is formed of a synthetic resin into a plate shape, and is integrally provided with a knob 30a. One end of the plate-shaped portion is fixed to the upper case 24 from above by a tapping screw 30b. At the other end of the plate-shaped portion, a locking claw 3 that engages with the opening edge of the charging port 24d
0c is formed. Further, a resin hinge is provided in the plate-like portion by forming a concave groove 30d on the back surface so that the connector cover 30 can be bent as shown by a two-dot chain line b in the drawing. I have.

In FIG. 5, reference numeral 31 denotes a rear clamp for fixing the battery case 21 to a support box 25 described later, and reference numeral 32 denotes a front clamp for fixing the front portion of the battery case 21 to the down tube 2b. Each of the clamps 31 and 32 has a structure in which each engagement ring is hooked to the other side and pulled. The engagement ring of the rear side clamp 31 is hooked on the projection 33 of the support box 25 as shown in FIG. 5 is configured to be hung on the support plate 34 of the down tube 2b as shown in FIG. In addition,
Handles 35 and 36 are used to lift the battery case 21. The handle 35 is screwed to the upper portion of the upper case 24, and the handle 36 is screwed so as to extend from the front surface of the lower case 23 to the front surface of the upper case 24. I have.

As shown in FIG. 9, the support box 25 for supporting the battery case 21 is formed integrally with a synthetic resin into a substantially bottomed rectangular cylindrical shape. And supported by the motor bracket 5 of the frame 2 via the stay 41.
That is, the support box 25 is connected to the lower part of the foot space S.
It is arranged in the part which becomes. The support box 25 is formed in a shape into which the above-mentioned battery case 21 is fitted, and a part thereof is formed as shown in FIG.
The opening width is narrower than other portions so that b can be fitted.

A narrow portion 2 having a narrow opening width is formed.
A motor side connector 42 connected to the discharge connector 26 of the battery case 21 is attached to 5a, and a support shaft 43 for swingably connecting the support box 25 to the stay 41 is supported. Note that the bearing portions 25 b supporting the support shaft 43 are provided on the left and right below the narrow portion 25 a, and are provided integrally with the support box 25.

The clamp 3 of the battery case 21
The projection 33 on which the first engagement ring is hung is formed in the narrow portion 25a.
The engaging hole 25d with which the engaging portion of the engaging button 28 engages is also formed in the narrow portion 25a.

As described above, if the battery case 21 is provided with the protruding portion 24b so as to be fitted to the support box 25, the discharge connector 26 must be connected to the motor side connector 42 when the battery case 21 is mounted on the support box 25.
Will be opposed.

The motor-side connector 42 is of a male type so as to be connected to the discharge connector 26, and the connection direction between the contact 42a and the discharge connector 26 is the same as the fitting direction of the battery case 21. It is attached to the support box 25 so as to be in the same direction. As the mounting structure, as shown in FIGS.
2 is screwed so as to support the bottom of the narrow portion 25a. 8 and 9
Reference numeral 42b denotes a fixing screw for fixing the motor-side connector 42, and reference numeral 42c denotes a nut plate.

The stay 41 is formed of a steel plate.
As shown in FIGS. 7 and 9, arm portions 41a through which the support shaft 43 passes are provided on the left and right. The upper and lower portions of the stay 41 are screwed to the motor bracket 5 as shown in FIGS. The stay fixing screw is indicated by reference numeral 41b in FIGS.

A return spring 44 penetrated by a support shaft 43 is elastically mounted between the upper portion of the stay 41 and the support box 25, and is provided between the lower portion of the stay 41 and the bottom of the support box 25. A link type connecting member 45 is interposed.

The return spring 44 is constituted by a torsion spring, one end of which is engaged with the stay 41 and the other end of which is in contact with the bottom of the narrow portion 25a, and biases the support box 25 clockwise in FIG. Have been. The link type connecting member 45 is formed by connecting two links 45a and 45b with a pin 45c. One end of one link 45a is pivotally supported by the stay 41, and the other link 45b is pivotally supported by the support box 25. I have. 7 and 9, reference numeral 46 denotes a screw for attaching the link 45a to the stay 41, and 47 denotes a link 4
A screw 48 for attaching 5b to the support box 25, and a nut plate 48 to which the attachment screw 47 is screwed.

Reference numeral 49 in FIGS. 7 and 9 denotes a holding member for swinging the support box 25 downward to hold the bottom surface thereof in parallel with the stay 41.
9 is fixed to the stay 41 by a screw 49a,
Engagement projection 2 projecting downward from the bottom of support box 25
5e. The holding member 49 is maintained in the clamped state only by the spring force of the return spring 44 for urging the support box 25 upward, but when a force for raising the support box 25 by hand is applied. ,
The engagement projection 25e is configured to slip off.

Reference numeral 50 denotes a compression coil spring. The compression coil spring 50 has a lower diameter smaller than an upper diameter, and is formed integrally with a cylindrical portion 25 on the inner bottom of the support box 25.
The lower part is press-fitted and fixed to f. In addition, the vertical length of the contact 42 of the motor-side connector 42
The length is set to be longer than the protrusion dimension of a.

That is, the compression coil spring 50
When the battery case 21 is fitted to the bottom of the support box 25, the upper end of the compression coil spring 50 contacts the battery case 21 before the battery case 21 is fitted to the support box 25 and the discharge connector 26 is connected to the motor-side connector 42. Will do. For this reason, since the compression coil spring 50 serves as a buffer, it is possible to prevent an excessive force from being applied to both connectors when the connectors are connected to each other. Also,
Even when the battery case 21 is pulled out from the support box 25, the connection state of the connector can be released by the spring force because the battery case 21 is pressed by the compression coil spring 50.

In FIG. 9, reference numeral 51 denotes a connection cable for electrically connecting the motor-side connector 42 of the support box 25 and a motor-side circuit (not shown), and passes through an opening 41c formed in the stay 41. To the motor unit side.

The support box 25 thus configured is swung up and down around the support shaft 43, and the battery case 21 is detached while the opening thereof is swung so as to face upward. That is, when the upper cover 10c of the outer cover 10 is opened and the battery case 21 is not mounted, the support box 25 is moved by the spring force of the return spring 44 as shown by a two-dot chain line c in FIGS. Since it swings upward, the battery case 21 is mounted in that state. At that time, the link type connecting member 45 is extended as shown by a two-dot chain line d in FIG.

When the battery case 21 is mounted, the battery case 21 is inserted vertically into the opening of the support box 25 (discharge connector 26 is directed downward). This is done by pressing down against the spring force. When the battery case 21 is inserted to the innermost part of the support box 25,
The discharge connector 26 is connected to the motor-side connector 42, and the locking button 28 of the battery case 21 is locked in the engagement hole 25 d of the support box 25. By locking the locking button 28, the battery case 21 is prevented from coming off.

After the battery case 21 is mounted in this manner, the battery case 21 is
Is fixed to the support box 25, and the support box 25 is swung so that the battery case 21 is tilted forward against the spring force of the return spring 44. And the battery case 21
Of the front side clamp 32 of the down tube 2b
To fix the battery case 21 to the frame 2. By bringing the battery case 21 forward, the link type connecting member 45 is bent as shown in FIG. 7 and the engaging protrusion 25 e of the support box 25 is sandwiched by the holding member 49 of the stay 41. And this
By moving the battery case 21 forward
The battery case 21 formed in a long shape is
As shown by a broken line in FIG. 1, the upper side of the down tube 2b
So that its longitudinal direction is along this down tube 2b
Be placed.

After fixing the battery case 21 as described above, the upper cover 10c of the outer cover 10 is closed,
When the vehicle is locked by the locking device 11, the vehicle can be driven. This running state, that is, the battery case 2
1 is in the vehicle-mounted state, the discharge connector
The direction of connection between the motor 26 and the motor-side connector 42 is
The direction is parallel to the axis of the tube 2b.

Next, a procedure for charging the battery 22 in the electric bicycle 1 configured as described above will be described. To charge, the battery case 21
And removing the battery case 21 from the vehicle body, and a method in which the battery case 21 is mounted on the vehicle body. First, a method of charging by removing the battery case 21 from the vehicle body is shown in FIG.
This will be described with reference to FIG.

First, the locking device 11 provided at the front of the outer cover 10 is unlocked by the key 11a, and FIG.
As shown in FIG. 1A and the two-dot chain line a in FIG. 1, the upper cover 10c of the outer cover 10 is pulled upward and opened. By doing so, the battery case 21 and the support box 2
5 is exposed.

Next, as shown in FIG. 3B, a clamp 32 for fixing the battery case 21 to the frame 2 is provided.
, And then the clamp 31 is removed. Then, the locking portion of the locking button 28 facing the engaging hole 25d of the support box 25 is pushed as shown by an arrow d in FIG.
Release the locked state of. When the locking state of the locking button 28 is released in this manner, the battery case 21 is pressed by the spring force of the compression coil spring 50, and the discharge connector 26 is disengaged from the motor-side connector 42.

After the respective locking portions are released, the battery case 21 is raised by holding the handle 36. The state in which it is caused is shown by a two-dot chain line e in FIG. And FIG.
The support box 25 is lifted up and removed as shown in FIG. After the battery case 21 has been removed, the support box 25 is tilted forward and the upper cover 10c of the outer cover 10 is closed as shown in FIG. On the other hand, the removed battery case 21 is connected to a charger as shown in FIG.

In FIG. 11, reference numeral 52 denotes a charger, 53 denotes a plug connected to an outlet (not shown), and 54 denotes a charger 52.
Shows the connector connected to. To perform charging, the connector cover 30 of the battery case 21 is opened, and the connector 54 on the charger side is inserted into the opened charging port 24d.
This is performed by connecting to the charging connector 27.

To charge the battery case with the battery case 21 mounted on the vehicle body, as shown in FIG.
0 with the upper cover 10c open. That is,
The upper cover 10c is opened, and the connector cover 30 of the battery case 21 is opened. And the charging port 2 opened
4d, the connector 54 on the charger side is inserted and connected to the charging connector 27.

Therefore, the electric power configured as described above is used.
According to the mounting structure of the battery case for moving bicycles,
The battery case 21 formed in a shape like a down tube 2
b.
When attaching the base 21 to the car body or removing it from the car body
The height of lifting the battery case 21
The height may be approximately the same as that of the tube 2b, and it is open upward.
Can be widely used as a work space,
Put the heavy battery case 21 on the down tube 2b
There is nothing in the way to put it on. Also,
The battery case 21 is large upward from the down tube 2b.
Because it does not protrude sharply, the foot above the down tube 2b
The space S is greatly narrowed by the battery case 21
It will not be.

Further, the battery is released below the battery case 21.
Fixing the power connector 26 and opening it upward
The lower part of the foot space S
Since the motor side connector 42 is fixed, the motor side connector 4
2 will be positioned low on the vehicle,
When connecting the discharge connector 26 to the
Can be easily confirmed.

Furthermore, since the connection direction of the discharge connector 26 provided on the battery case 21 and the motor-side connector 42 provided on the support box 25 was made to coincide with the attachment / detachment direction of the battery case 21,
By detachably 1 for supporting box 25, the discharge connector 26 is to be separable with respect to the motor side connector 42. Therefore, in connecting the discharge connector 26 to the motor-side connector 42, no special operation other than the operation of attaching and detaching the battery case is required.

In addition, the discharge connector 26 and the motor side connector
When the connection direction with the connector 42 is
Since the direction is parallel to the axis of the
In a vehicle-mounted state where the case 21 is mounted on the vehicle body, the battery case
The discharge connector 26 on the motor side due to the weight of the base 21
It is urged to the connector 42 side.

In the above embodiment, the motor unit 12 is set up and provided coaxially with the seat tube 2c. However, the mounting position of the motor unit 12 is shown in FIG.
As shown in FIG. 3 and FIG. 14, it may be below the down tube 2b.

FIG. 13 is a side view showing another example of the electric bicycle in which the position of the motor unit is changed, and FIG. 14 is a sectional view taken along line AA in FIG. In this electric bicycle, a down tube 2b of the frame 2 is formed substantially horizontally at a rear end portion between the handle 6 and the seat 7, and a seat tube 2c is provided at a rear end of the down tube 2b via a lug 61.
Are connected. The horizontal portion of the down tube 2b is positioned at substantially the same height as the axles of the front and rear wheels.
This frame 2 is also substantially V-shaped in a side view similarly to the above-described embodiment.
Is provided with a foot space S.

The motor unit 12 is supported and fixed to the horizontal portion of the down tube 2b so as to be substantially horizontal. The support box 25 to which the battery case 21 is attached is also supported by a horizontal portion via a support member 62. In addition, the battery case 21
~ As in the embodiment shown in FIG.
Structure arranged along the upper side of the tube 2b
It has become.

Even with this configuration, the battery case
When attaching or removing the 21 from the body,
The height to lift the battery case 21 is a down tube
The height may be substantially the same as 2b. Also, the battery case 21
Does not protrude significantly upward from the down tube 2b
The foot space S above the down tube 2b is
There is no narrowing by the lead case 21.

When the motor unit 12 is mounted forward as in this embodiment, the motor unit 12, which is a heavy object, is positioned at a low position, and the center of gravity of the vehicle body can be lowered.

In each of the above-described examples, the support box 25 is swingable back and forth with respect to the vehicle body. However, the support box 25 may be of a fixed type as shown in FIGS.

FIG. 15 is a side view showing another embodiment in which the support box of the electric bicycle on which the motor unit is erected is fixed, and FIG. 16 is a view in which the support box of the electric bicycle with the motor unit facing forward is fixed. FIG. 8 is a side view showing another embodiment according to the present invention .
You. In these drawings, the same or equivalent members as those described in FIGS. 1 to 14 are denoted by the same reference numerals, and detailed description is omitted.

In FIGS. 15 and 16, reference numeral 63 denotes a support box on which the battery case 21 is mounted. The support box 63 is formed in a rectangular tube shape with a bottom in which the battery case 21 is inserted, and is fixed to the vehicle body with an opening facing the head pipe 2 a of the frame 2. The support box 63 shown in FIG. 15 is fixed to the motor bracket 5,
The support box 63 shown in FIG. 6 is fixed to the horizontal portion of the down tube 2b.

The motor-side connector 42 connected to the discharge connector 26 of the battery case 21 is mounted in the support box 63. The connection direction of these connectors is the same as the depth direction of the support box 63. The discharge connector 26 is provided at one end of the battery case 21 in this example.

When the support box 63 is configured as described above, the battery case 21 is detached from the vehicle body by pulling up the battery case 21 along the down tube 2b in the direction of arrow e in FIG. When the battery case 21 is attached, the battery case 21 may be pushed down in the opposite direction to the above procedure.

Even with this configuration, the battery case
When attaching or removing the 21 from the body,
The height to lift the battery case 21 is a down tube
2b may be approximately the same height, and the foot is open upward
The through space can be widely used as a work space,
The battery case 21 is mounted on the down tube 2b.
There is nothing in the way. Also battery
-The case 21 protrudes greatly upward from the down tube 2b.
Because it does not come out, the foot space above the down tube 2b
S may not be narrowed by the battery case 21.
No.

Further, the motor-side connector 42 is
Being located under the open foot space
Therefore, when connecting the discharge connector 26 to this,
It can be done while easily checking the destination. Furthermore, Batte
By attaching and detaching the lead case 21 to and from the vehicle body,
And the discharge connector 26 is
Since the contact and separate Te, special operations are not required to discharge connector 26 in addition to the battery case releasably operated Upon is connected to the motor side connector 42.

In addition, the battery case 21 is mounted on the vehicle body.
When mounted on the vehicle, the weight of the battery case 21
The discharge connector 26 toward the motor-side connector 42
Therefore, these two connectors 26 and 42 are surely connected to each other.
Is kept connected.

Each of the embodiments shown in FIGS.
Then, the motor-side connector 42 is connected to the bottom of the foot space S.
Near the motor-side connector 42
Because the motor 13 and the control unit 20 are arranged in
Cables for signal and signal transmission
Power transmission loss as much as possible.
The advantage is that

[0073]

As described above, the mounting structure of the battery case for an electric bicycle according to the first invention is an electric bicycle.
Body frame extending downward from the head pipe
A seat tube extending upward at the rear of the down tube
An underpass that is fixed and opened upward in a generally V-shaped side view
The structure is provided with a gap, and the upper side of the down tube
, And a long battery
Hold the case along the down tube with its longitudinal
The lower part of this battery case
The discharge contact terminal is fixed to the
Of the battery case at the bottom of the
A mode that comes into contact with and separates from the discharge contact terminal with the attachment / detachment operation
The battery case is
When attaching to or removing from the vehicle body,
The lifting height is almost the same as the down tube
No. At the same time, work on the foot space opened upward
Heavy battery case that can be widely used as space
When mounting the on the down tube,
Excellent workability because there is nothing.

For this reason, when attaching / detaching the battery case,
Without lifting it to a high position above the rear wheels.
Because it is good, the work of attaching and detaching the battery case becomes light work.
Also, the battery case is large upward from the down tube.
The foot space above the down tube does not project
Is it not greatly reduced by the battery case?
Easy to get on and off without disturbing the battery case
No.

Further, the motor side contact terminals are opened upward.
This is located at the bottom of the
When connecting the discharge contact terminal on the battery case side to
It can be done while easily confirm the connection destination. Because of this,
Easily connect the power contact terminal to the motor-side contact terminal and
Connection can be made securely without error.

Further, in the first invention, the discharge contact end is provided.
Battery case attachment / detachment operation between battery and motor side contact terminal
In the second invention, the discharge contact
Check that the connection direction between the contact terminals and the motor-side contact terminals is
Battery case to match the mounting / detaching direction of the battery case.
By attaching and detaching to and from the vehicle body, the contact terminals for discharge
Are moved toward and away from the motor-side contact terminal. Therefore,
The discharging contact terminals when to contact and separation motor side contact terminals, special operation is not required in addition to the battery case removably operation. For this reason, there is an effect that the attaching / detaching operation of the battery case becomes simple, and the charging operation is simplified.

[0077] mounting structure of the third electric bicycle battery case according to the invention, the bar electric bicycle according to the first invention
In the mounting structure of the battery case,
When the connection direction with the motor side contact terminal is
The battery is oriented parallel to the tube axis.
Battery case when the case is mounted on the vehicle body
Of the discharge contact terminal to the motor contact terminal due to the weight of
Be energized. Therefore, the two contact terminals are surely
It is kept connected.

[Brief description of the drawings]

FIG. 1 is a side view of an electric bicycle employing a battery case mounting structure according to a first invention.

FIG. 2 is an enlarged cross-sectional view showing a support portion of a battery case support box.

FIG. 3 is a view of the motor unit in FIG.

FIG. 4 is a plan view of a battery case support box.

FIG. 5 is an exploded perspective view of a battery case.

FIG. 6 is an enlarged view showing a charging port portion of the battery case, wherein FIG. 6 (a) is a plan view, FIG. 6 (b) is a sectional view taken along line BB in FIG. 6 (a), and FIG. FIG. 3 is a cross-sectional view taken along the line CC in FIG.

FIG. 7 is a vertical sectional view of a battery case support box.

8 is a sectional view taken along line VIII-VIII in FIG.

FIG. 9 is an exploded perspective view of the battery case support box.

FIG. 10 is a perspective view showing a procedure for removing a battery case from a vehicle body. FIG. 10A shows a state in which an outer cover is opened, and FIG. 10B shows a state in which the battery case is removed from a support box. Is shown. FIG. 3C shows a state in which the battery case is removed from the support box, and FIG. 3D shows a state in which the battery case is removed from the vehicle body.

FIG. 11 is a perspective view showing a state when the battery case is removed from the vehicle body and charged.

FIG. 12 is a perspective view showing a state when charging without removing the battery case from the vehicle body.

FIG. 13 is a side view showing another example of the electric bicycle in which the position of the motor unit is changed.

FIG. 14 is a sectional view taken along line AA in FIG.

FIG. 15 is a side view showing another embodiment in which the support box of the electric bicycle on which the motor unit is erected is fixed.

FIG. 16 is a side view showing another embodiment in which the support box of the electric bicycle with the motor unit facing forward is fixed.

[Explanation of symbols]

1 ... electric bicycle , 2 ... frame , 2a ... head pipe,
2b ... down tube, 2c ... seat tube, 12 ...
Motor unit , 21 ... battery case , 25 ... support box , 26 ... discharge connector , 42 ... motor side connector ,
43 : Support shaft , 63 : Support box , S: Foot space.

Claims (3)

(57) [Claims] 1. A vehicle body frame for an electric bicycle, comprising:
Upward at the back of the down tube that extends backward from Ip
By fixing the seat tube extending to the side
A substantially V-shaped upwardly open footing space is provided.
And a battery on top of the down tube.
Store the long battery case in its length.
With your hand on the vehicle, wear it along this down tube.
It is detachably provided, and a discharge connection is
At the same time as fixing the contact terminals,
To attach and detach the battery case to the body frame side
A motor-side contact end that is brought into contact with or separated from the discharge contact terminal accordingly.
A battery case mounting structure for an electric bicycle, wherein a child is fixed . 2. The battery for an electric bicycle according to claim 1.
In the case mounting structure, the discharge contact terminal and the motor side
Make sure that the connection direction with the contact terminals is
The mounting structure of the battery case for the electric bicycle, which is matched . 3. The battery for an electric bicycle according to claim 1.
In the case mounting structure, the discharge contact terminal and the motor side
Set the connection direction with the contact terminal to
A mounting structure for a battery case for an electric bicycle, wherein the mounting direction is substantially parallel to the axis of the hub .